1. Warm-up What is interesting about these triangles? 3 4 x y 12 13 7 z 25 Find x, y & z.

2. Warm-up

3. Agenda Homework Review Midpoint Project Class work Page 765, Lessons 1-5 Homework

4. 1-5 Study Guide

6. Practice 1-5

9. Midpoint Project Hand out graph paper and rulers Draw x-axis, y-axis Choose a random point in either upper quadrant Choose a random point in the opposite lower quadrant Locate the point’s coordinates (2, 4) (-4, -4)

10. Midpoint Project Use midpoint formula to determine midpoint coordinate (2, 4) (-4, -4) Mark midpoint Use ruler to draw line Are the 3 points collinear? (-1, 0)

11. Midpoint Project Use ruler to determine measure of line segment and distance to midpoint Use distance formula to check answers (2, 4) (-4, -4) (-1, 0)

12. Midpoint Project (2, 4) (-4, -4) (-1, 0) Fold paper by touching points Notice effect on midpoint

13. Class work Page 765, Lessons 1-5

14. Lesson 1-5

19. Homework Define the Ruler and Segment Addition Postulates in your own words. Use equations and diagrams as part of your explanation. Be prepared to hand it in for a grade.